215354341145 has 4 divisors (see below), whose sum is σ = 258425209380. Its totient is φ = 172283472912.

The previous prime is 215354341141. The next prime is 215354341277. The reversal of 215354341145 is 541143453512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 68852185609 + 146502155536 = 262397^2 + 382756^2 .

It is a cyclic number.

It is not a de Polignac number, because 215354341145 - 2² = 215354341141 is a prime.

It is a super-2 number, since 2×215354341145² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 215354341099 and 215354341108.

It is not an unprimeable number, because it can be changed into a prime (215354341141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21535434110 + ... + 21535434119.

It is an arithmetic number, because the mean of its divisors is an integer number (64606302345).

Almost surely, 2^215354341145 is an apocalyptic number.

It is an amenable number.

215354341145 is a deficient number, since it is larger than the sum of its proper divisors (43070868235).

215354341145 is an equidigital number, since it uses as much as digits as its factorization.

215354341145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43070868234.

The product of its digits is 144000, while the sum is 38.

Adding to 215354341145 its reverse (541143453512), we get a palindrome (756497794657).

The spelling of 215354341145 in words is "two hundred fifteen billion, three hundred fifty-four million, three hundred forty-one thousand, one hundred forty-five".